I'm not sure what you are basing your confidence on? the terrorist threat is either home grown or comes from the east ie through Europe, no terrorist attack in Europe has come from the uk.
We ve had massive cuts in community policing, we ve 3 yes 3 border force boats for the entire UK coast line, the boots on the ground for intel gathering have been removed by the Tories.
The French and Germans in particular, have spent a fortune on beefing up their intelligence services in the last 30 years or so.
Of course we are stronger together but as i 'll repeat, May has made this impossible by her red lines.
You seem genuinely concerned about IS co-operation, so what do you think about May's red line on ECJ ?